Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1071/BT17150 |
Demographic vulnerability of an extreme xerophyte in arid Australia | |
Prior, Lynda D.1; Hua, Quan2; Bowman, David M. J. S.1 | |
通讯作者 | Prior, Lynda D. |
来源期刊 | AUSTRALIAN JOURNAL OF BOTANY
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ISSN | 0067-1924 |
EISSN | 1444-9862 |
出版年 | 2018 |
卷号 | 66期号:1页码:26-38 |
英文摘要 | Callitris glaucophylla (syn. C. columellaris F. Muell.) is an iconic Australian conifer that is suffering a recruitment deficit over much of the arid zone. Here, seedling establishment requires a series of unusually wet years, and protection from high levels of herbivory. The aim of our study was to determine the size class structure of C. glaucophylla populations in the most arid part (150 mm mean annual precipitation) of its range, and particularly whether seedlings had established during a wet period in 2010/11. We sampled C. glaucophylla populations throughout the region, including inside a 6000 ha feral animal exclosure. We found no seedlings from 2010/11, except on drainage lines adjacent to roads. Of 255 plots centred on mature trees, only 2% contained older seedlings, and 8% contained saplings, with no differences inside or outside exclosure, and 84% of trees were larger than 20 cm basal diameter. Matching dates of known regeneration with long-term rainfall records suggested that successful regeneration of C. glaucophylla requires a total of 600-720 mm of rain over a 2 year period. Our radiocarbon dating showed the age of three large trees ranged from 106 to 268 years, signifying that such trees in this region likely have only 2-8 climatic opportunities to reproduce. |
英文关键词 | arid plant ecology Callitris spp. conifers herbivory population biology regeneration |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000426048700003 |
WOS关键词 | CALLITRIS-GLAUCOPHYLLA CUPRESSACEAE ; TREE-RINGS ; HOLOCENE PALEOENVIRONMENTS ; NORTHWESTERN VICTORIA ; MACDONNELL RANGES ; LAKE TYRRELL ; CONIFER ; COLUMELLARIS ; RADIOCARBON ; GROWTH |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/208012 |
作者单位 | 1.Univ Tasmania, Sch Biol Sci, Private Bag 55, Hobart, Tas 7001, Australia; 2.Australian Nucl Sci & Technol Org, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia |
推荐引用方式 GB/T 7714 | Prior, Lynda D.,Hua, Quan,Bowman, David M. J. S.. Demographic vulnerability of an extreme xerophyte in arid Australia[J],2018,66(1):26-38. |
APA | Prior, Lynda D.,Hua, Quan,&Bowman, David M. J. S..(2018).Demographic vulnerability of an extreme xerophyte in arid Australia.AUSTRALIAN JOURNAL OF BOTANY,66(1),26-38. |
MLA | Prior, Lynda D.,et al."Demographic vulnerability of an extreme xerophyte in arid Australia".AUSTRALIAN JOURNAL OF BOTANY 66.1(2018):26-38. |
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